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Wayne, Engine Rebuilder
Category: Small Engine
Satisfied Customers: 9209
Experience:  many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines
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Wayne I bought a bottle of Sea Foam. I put 4 oz in 1gallon

Customer Question

I bought a bottle of Sea Foam. I put 4 oz in 1gallon of gas in the gas tank. I also sprayed some in the carburetor intake as shown in the video on the Sea Foam web site. When I tried to cut grass I still had backfiring. This morning I repeated the air intake spray. After that I still have backfiring. It is backfiring from the exhaust. Any more ideas?
Submitted: 9 months ago.
Category: Small Engine
Expert:  Wayne replied 9 months ago.

HI I'm Wayne

if it is not the valves, cleaner in the gas tank

the only thing left is the carb

it will need to be replaced